Abstract

The study investigates an electron beam cladded coating of nitrogen-alloyed austenitic steel (24.4Cr, 16.4Mn, 0.18Ni, 1.1Si, 0.57С, 0.7N, rest Fe (wt %)). Cladding was performed by a continuous low-energy (27 keV) and low-current (0.02–0.04 A) focused electron beam on an electron beam system at a residual pressure of 0.1 Pa. The microstructure, phase composition, and chemical composition of the coating were examined by OM/AES/XRD/SEM/EDS methods. The coating has no pores and is characterized by high work hardening and wear resistance. The formation of М₇(С, N)₃ carbonitrides in the steel plays a crucial role in the control of the structure and wear resistance of the applied coating, because carbonitrides are able to distinguish between the lattice curvature zones and the stable translationally invariant lattice. Frictional loads arising during wear trigger a γ → α′ transformation. With increasing frictional load, the coefficient of friction decreases.

中文翻译：

---

电子束熔覆碳氮奥氏体钢涂层的组织和耐磨性的控制

摘要

该研究研究了氮合金奥氏体钢（24.4Cr，16.4Mn，0.18Ni，1.1Si，0.57С，0.7N，剩余铁（重量％））的电子束熔覆涂层。在残余压力为0.1 Pa的情况下，通过连续的低能量（27 keV）和低电流（0.02–0.04 A）聚焦电子束在电子束系统上进行包覆。通过OM / AES / XRD / SEM / EDS方法检查涂层。该涂层无孔，具有高加工硬化性和耐磨性的特点。М的形成₇（С，N）₃钢中的碳氮化物在控制涂层结构和耐磨性方面起着至关重要的作用，因为碳氮化物能够区分晶格曲率区和稳定的平移不变晶格。磨损过程中产生的摩擦载荷会触发γ→α'转换。随着摩擦载荷的增加，摩擦系数减小。